原位钻孔剪切试验在高填方工程中的应用研究

pplication Research of In-situ Drilling Shear Test in High Embankment Engineering

为有效分析高填方工程强夯对地基的影响程度,本文通过开展原位钻孔剪切试验得到夯前、夯后不同深度状态下的抗剪强度参数,计算得到对应的抗剪强度,分析强夯对抗剪强度的影响情况,并与圆锥动力触探试验、多道瞬态面波测试结果对比分析。原位钻孔剪切试验结果表明,强夯能够显著提升抗剪强度,但随着深度的增加,强夯对填土体的抗剪强度的提升效果逐渐减小,在深度为17m时影响可忽略。圆锥动力触探试验、多道瞬态面波测试结果与原位钻孔剪切试验结果较为类似,证明了原位钻孔剪切试验在高填方工程中的应用是可靠的。

To effectively analyze the extent of impact of dynamic compaction on the foundation in high embankment engineering,this study conducts in-situ drilling shear tests to obtain shear strength parameters at different depths before and after compaction.The corresponding shear strength values are calculated to analyze the influence of dynamic compaction on shear strength.A comparative analysis is conducted with results from cone penetration tests and multi-channel transient surface wave tests.The results of the in-situ drilling shear tests indicate that dynamic compaction significantly enhances shear strength.However,as depth increases,the effectiveness of dynamic compaction in improving shear strength gradually diminishes,becoming negligible at a depth of 17 meters.Comparative analysis with cone penetration tests and multi-channel transient surface wave tests shows similar results to the in-situ drilling shear tests,confirming the reliability of in-situ drilling shear tests in high embankment engineering.